Automobile(s): '80 Fleetwood Coupe, 1994 and 1995 Mercedes 140 Coupe
Re: drop horsepower
Originally Posted by bigblockcaddy
i have a question..i know that the 77,78,and 79 all have the 425 but i have always wondered since i have the 79 the last year they made the 425 is it more advanced or have a little bit more spunk because they had a couple years to look over the engine from the 77 to the 79..so would the 79 engine be a little more advanced cause its a later model engine of that car??
Different year 425's DO have differences. The engines are exactly the same but fuel system parts and calibration differ. Even timing proceedure changes.